AI Article Synopsis
- The study focuses on synthesizing and characterizing europium and terbium complexes with different charges, using specific ligands derived from the cyclen macrocycle.
- The complexes exhibit a varying emission quantum yield of 15-40% when tested in oxygen-saturated water, indicating their ability to emit light.
- When in contact with electron-rich substances, the excited state of these complexes is quenched through an electron transfer mechanism, and the positively charged versions are absorbed by certain cell types, accumulating in the nucleus.
Article Abstract
The synthesis and photophysical characterisation are reported of a series of cationic, neutral and anionic europium and terbium complexes based on structurally related, nonadentate ligands based on the cyclen macrocycle. Each complex incorporates a tetraazatriphenylene moiety and overall absolute emission quantum yields are in the range 15-40% in aerated aqueous media. Dynamic quenching of the lanthanide excited state occurs with electron-rich donors, e.g. iodide, ascorbate and urate, and a mechanistic interpretation is put forward involving an electron transfer process. The cationic lanthanide complexes are taken up by NlH/3T3 cells and tend to localise inside the cell nucleus.
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| http://dx.doi.org/10.1039/b418964g | DOI Listing |
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